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/* |
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* Written by Doug Lea with assistance from members of JCP JSR-166 |
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* Expert Group and released to the public domain, as explained at |
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* http://creativecommons.org/publicdomain/zero/1.0/ |
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*/ |
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|
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package extra166y; |
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import jsr166y.*; |
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import static extra166y.Ops.*; |
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import java.util.*; |
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import java.util.concurrent.atomic.*; |
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import java.lang.reflect.Array; |
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|
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/** |
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* An array of longs supporting parallel operations. This class |
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* provides methods supporting the same operations as {@link |
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* ParallelArray}, but specialized for scalar longs. It additionally |
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* provides a few methods specific to numerical values. |
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* |
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* <p><b>Sample usages</b>. |
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* Here is a complete (although naive) prime filter program: |
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* <pre> |
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* import java.math.BigInteger; |
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* import jsr166y.*; |
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* import static extra166y.Ops.*; |
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* import static extra166y.ParallelLongArray.*; |
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* |
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* public class Sieve { |
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* public static void main(String[] args) { |
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* int n = Integer.parseInt(args[0]); |
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* // create array of divisors |
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* ParallelLongArray a = create(n-1, defaultExecutor()); |
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* a.replaceWithMappedIndex(add2); |
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* int i = 0; |
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* long p = 2; |
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* while (p * p < n) { // repeatedly filter |
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* a = a.withFilter(notDivisibleBy(p)).all(); |
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* p = a.get(++i); |
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* } |
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* System.out.printf("sieve(%d) = %s%n", n, a); |
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* // check result |
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* if (!a.withFilter(notProbablePrime).isEmpty()) |
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* throw new Error(); |
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* } |
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* static IntToLong add2 = new IntToLong() { |
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* public long op(int i) { return i + 2; } }; |
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* static LongPredicate notDivisibleBy(final long p) { |
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* return new LongPredicate() { |
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* public boolean op(long n) { return n <= p || (n % p) != 0; } |
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* }; } |
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* static LongPredicate notProbablePrime = new LongPredicate() { |
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* private static final int CERTAINTY = 8; |
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* public boolean op(long n) { |
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* return !BigInteger.valueOf(n).isProbablePrime(CERTAINTY); |
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* } |
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* }; |
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* } |
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* </pre> |
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*/ |
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public class ParallelLongArray extends AbstractParallelAnyArray.LUPap { |
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// Same internals as ParallelArray, but specialized for longs |
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AsList listView; |
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|
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/** |
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* Returns a common default executor for use in ParallelArrays. |
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* This executor arranges enough parallelism to use most, but not |
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* necessarily all, of the available processors on this system. |
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* @return the executor |
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*/ |
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public static ForkJoinPool defaultExecutor() { |
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return PAS.defaultExecutor(); |
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} |
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|
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/** |
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* Constructor for use by subclasses to create a new ParallelLongArray |
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* using the given executor, and initially using the supplied |
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* array, with effective size bound by the given limit. This |
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* constructor is designed to enable extensions via |
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* subclassing. To create a ParallelLongArray, use {@link #create}, |
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* {@link #createEmpty}, {@link #createUsingHandoff} or {@link |
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* #createFromCopy}. |
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* @param executor the executor |
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* @param array the array |
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* @param limit the upper bound limit |
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*/ |
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protected ParallelLongArray(ForkJoinPool executor, long[] array, |
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int limit) { |
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super(executor, 0, limit, array); |
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if (executor == null || array == null) |
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throw new NullPointerException(); |
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if (limit < 0 || limit > array.length) |
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throw new IllegalArgumentException(); |
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} |
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|
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/** |
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* Trusted internal version of protected constructor. |
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*/ |
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ParallelLongArray(ForkJoinPool executor, long[] array) { |
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super(executor, 0, array.length, array); |
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} |
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|
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/** |
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* Creates a new ParallelLongArray using the given executor and |
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* an array of the given size. |
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* @param size the array size |
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* @param executor the executor |
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*/ |
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public static ParallelLongArray create |
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(int size, ForkJoinPool executor) { |
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long[] array = new long[size]; |
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return new ParallelLongArray(executor, array, size); |
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} |
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|
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/** |
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* Creates a new ParallelLongArray initially using the given array and |
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* executor. In general, the handed off array should not be used |
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* for other purposes once constructing this ParallelLongArray. The |
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* given array may be internally replaced by another array in the |
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* course of methods that add or remove elements. |
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* @param handoff the array |
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* @param executor the executor |
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*/ |
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public static ParallelLongArray createUsingHandoff |
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(long[] handoff, ForkJoinPool executor) { |
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return new ParallelLongArray(executor, handoff, handoff.length); |
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} |
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|
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/** |
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* Creates a new ParallelLongArray using the given executor and |
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* initially holding copies of the given |
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* source elements. |
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* @param source the source of initial elements |
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* @param executor the executor |
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*/ |
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public static ParallelLongArray createFromCopy |
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(long[] source, ForkJoinPool executor) { |
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// For now, avoid copyOf so people can compile with Java5 |
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int size = source.length; |
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long[] array = new long[size]; |
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System.arraycopy(source, 0, array, 0, size); |
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return new ParallelLongArray(executor, array, size); |
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} |
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|
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/** |
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* Creates a new ParallelLongArray using an array of the given size, |
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* initially holding copies of the given source truncated or |
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* padded with zeros to obtain the specified length. |
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* @param source the source of initial elements |
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* @param size the array size |
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* @param executor the executor |
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*/ |
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public static ParallelLongArray createFromCopy |
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(int size, long[] source, ForkJoinPool executor) { |
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// For now, avoid copyOf so people can compile with Java5 |
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long[] array = new long[size]; |
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System.arraycopy(source, 0, array, 0, |
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Math.min(source.length, size)); |
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return new ParallelLongArray(executor, array, size); |
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} |
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|
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/** |
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* Creates a new ParallelLongArray using the given executor and |
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* an array of the given size, but with an initial effective size |
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* of zero, enabling incremental insertion via {@link |
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* ParallelLongArray#asList} operations. |
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* @param size the array size |
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* @param executor the executor |
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*/ |
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public static ParallelLongArray createEmpty |
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(int size, ForkJoinPool executor) { |
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long[] array = new long[size]; |
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return new ParallelLongArray(executor, array, 0); |
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} |
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|
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/** |
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* Summary statistics for a possibly bounded, filtered, and/or |
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* mapped ParallelLongArray. |
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*/ |
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public static interface SummaryStatistics { |
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/** Returns the number of elements */ |
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public int size(); |
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/** Returns the minimum element, or Long.MAX_VALUE if empty */ |
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public long min(); |
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/** Returns the maximum element, or Long.MIN_VALUE if empty */ |
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public long max(); |
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/** Returns the index of the minimum element, or -1 if empty */ |
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public int indexOfMin(); |
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/** Returns the index of the maximum element, or -1 if empty */ |
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public int indexOfMax(); |
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/** Returns the sum of all elements */ |
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public long sum(); |
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/** Returns the arithmetic average of all elements */ |
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public double average(); |
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} |
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|
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/** |
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* Returns the executor used for computations. |
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* @return the executor |
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*/ |
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public ForkJoinPool getExecutor() { return ex; } |
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|
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/** |
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* Applies the given procedure to elements. |
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* @param procedure the procedure |
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*/ |
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public void apply(LongProcedure procedure) { |
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super.apply(procedure); |
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} |
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|
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/** |
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* Returns reduction of elements. |
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* @param reducer the reducer |
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* @param base the result for an empty array |
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* @return reduction |
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*/ |
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public long reduce(LongReducer reducer, long base) { |
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return super.reduce(reducer, base); |
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} |
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|
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/** |
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* Returns a new ParallelLongArray holding all elements. |
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* @return a new ParallelLongArray holding all elements |
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*/ |
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public ParallelLongArray all() { |
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return super.all(); |
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} |
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|
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/** |
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* Replaces elements with the results of applying the given op |
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* to their current values. |
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* @param op the op |
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* @return this (to simplify use in expressions) |
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*/ |
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public ParallelLongArray replaceWithMapping(LongOp op) { |
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super.replaceWithMapping(op); |
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return this; |
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} |
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|
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/** |
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* Replaces elements with the results of applying the given |
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* op to their indices. |
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* @param op the op |
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* @return this (to simplify use in expressions) |
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*/ |
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public ParallelLongArray replaceWithMappedIndex(IntToLong op) { |
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super.replaceWithMappedIndex(op); |
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return this; |
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} |
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|
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/** |
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* Replaces elements with the results of applying the given |
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* mapping to each index and current element value. |
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* @param op the op |
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* @return this (to simplify use in expressions) |
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*/ |
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public ParallelLongArray replaceWithMappedIndex(IntAndLongToLong op) { |
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super.replaceWithMappedIndex(op); |
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return this; |
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} |
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|
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/** |
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* Replaces elements with the results of applying the given |
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* generator. For example, to fill the array with uniform random |
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* values, use |
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* {@code replaceWithGeneratedValue(Ops.longRandom())}. |
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* @param generator the generator |
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* @return this (to simplify use in expressions) |
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*/ |
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public ParallelLongArray replaceWithGeneratedValue(LongGenerator generator){ |
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super.replaceWithGeneratedValue(generator); |
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return this; |
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} |
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|
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/** |
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* Replaces elements with the given value. |
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* @param value the value |
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* @return this (to simplify use in expressions) |
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*/ |
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public ParallelLongArray replaceWithValue(long value) { |
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super.replaceWithValue(value); |
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return this; |
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} |
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|
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/** |
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* Replaces elements with results of applying |
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* {@code op(thisElement, otherElement)}. |
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* @param other the other array |
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* @param combiner the combiner |
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* @return this (to simplify use in expressions) |
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*/ |
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public ParallelLongArray replaceWithMapping |
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(BinaryLongOp combiner, |
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ParallelLongArrayWithLongMapping other) { |
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super.replaceWithMapping(combiner, other); |
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return this; |
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} |
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|
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/** |
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* Replaces elements with results of applying |
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* {@code op(thisElement, otherElement)}. |
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* @param other the other array |
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* @param combiner the combiner |
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* @return this (to simplify use in expressions) |
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* @throws ArrayIndexOutOfBoundsException if other array has |
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* fewer elements than this array |
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*/ |
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public ParallelLongArray replaceWithMapping(BinaryLongOp combiner, |
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long[] other) { |
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super.replaceWithMapping(combiner, other); |
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return this; |
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} |
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|
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/** |
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* Returns the index of some element equal to given target, or -1 |
315 |
* if not present. |
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* @param target the element to search for |
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* @return the index or -1 if not present |
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*/ |
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public int indexOf(long target) { |
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return super.indexOf(target); |
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} |
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|
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/** |
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* Assuming this array is sorted, returns the index of an element |
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* equal to given target, or -1 if not present. If the array |
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* is not sorted, the results are undefined. |
327 |
* @param target the element to search for |
328 |
* @return the index or -1 if not present |
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*/ |
330 |
public int binarySearch(long target) { |
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return super.binarySearch(target); |
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} |
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|
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/** |
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* Assuming this array is sorted with respect to the given |
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* comparator, returns the index of an element equal to given |
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* target, or -1 if not present. If the array is not sorted, the |
338 |
* results are undefined. |
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* @param target the element to search for |
340 |
* @param comparator the comparator |
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* @return the index or -1 if not present |
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*/ |
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public int binarySearch(long target, LongComparator comparator) { |
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return super.binarySearch(target, comparator); |
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} |
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|
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/** |
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* Returns summary statistics, using the given comparator |
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* to locate minimum and maximum elements. |
350 |
* @param comparator the comparator to use for |
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* locating minimum and maximum elements |
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* @return the summary |
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*/ |
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public ParallelLongArray.SummaryStatistics summary |
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(LongComparator comparator) { |
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return super.summary(comparator); |
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} |
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|
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/** |
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* Returns summary statistics, using natural comparator. |
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* @return the summary |
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*/ |
363 |
public ParallelLongArray.SummaryStatistics summary() { |
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return super.summary(); |
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} |
366 |
|
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/** |
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* Returns the minimum element, or Long.MAX_VALUE if empty. |
369 |
* @param comparator the comparator |
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* @return minimum element, or Long.MAX_VALUE if empty |
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*/ |
372 |
public long min(LongComparator comparator) { |
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return super.min(comparator); |
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} |
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|
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/** |
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* Returns the minimum element, or Long.MAX_VALUE if empty. |
378 |
* @return minimum element, or Long.MAX_VALUE if empty |
379 |
*/ |
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public long min() { |
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return super.min(); |
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} |
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|
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/** |
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* Returns the maximum element, or Long.MIN_VALUE if empty. |
386 |
* @param comparator the comparator |
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* @return maximum element, or Long.MIN_VALUE if empty |
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*/ |
389 |
public long max(LongComparator comparator) { |
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return super.max(comparator); |
391 |
} |
392 |
|
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/** |
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* Returns the maximum element, or Long.MIN_VALUE if empty. |
395 |
* @return maximum element, or Long.MIN_VALUE if empty |
396 |
*/ |
397 |
public long max() { |
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return super.max(); |
399 |
} |
400 |
|
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/** |
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* Replaces each element with the running cumulation of applying |
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* the given reducer. For example, if the contents are the numbers |
404 |
* {@code 1, 2, 3}, and the reducer operation adds numbers, then |
405 |
* after invocation of this method, the contents would be {@code 1, |
406 |
* 3, 6} (that is, {@code 1, 1+2, 1+2+3}). |
407 |
* @param reducer the reducer |
408 |
* @param base the result for an empty array |
409 |
* @return this (to simplify use in expressions) |
410 |
*/ |
411 |
public ParallelLongArray cumulate(LongReducer reducer, long base) { |
412 |
super.cumulate(reducer, base); |
413 |
return this; |
414 |
} |
415 |
|
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/** |
417 |
* Replaces each element with the cumulation of applying the given |
418 |
* reducer to all previous values, and returns the total |
419 |
* reduction. For example, if the contents are the numbers {@code 1, |
420 |
* 2, 3}, and the reducer operation adds numbers, then after |
421 |
* invocation of this method, the contents would be {@code 0, 1, |
422 |
* 3} (that is, {@code 0, 0+1, 0+1+2}, and the return value |
423 |
* would be 6 (that is, {@code 1+2+3}). |
424 |
* @param reducer the reducer |
425 |
* @param base the result for an empty array |
426 |
* @return the total reduction |
427 |
*/ |
428 |
public long precumulate(LongReducer reducer, long base) { |
429 |
return super.precumulate(reducer, base); |
430 |
} |
431 |
|
432 |
/** |
433 |
* Sorts the array. Unlike Arrays.sort, this sort does |
434 |
* not guarantee that elements with equal keys maintain their |
435 |
* relative position in the array. |
436 |
* @param comparator the comparator to use |
437 |
* @return this (to simplify use in expressions) |
438 |
*/ |
439 |
public ParallelLongArray sort(LongComparator comparator) { |
440 |
super.sort(comparator); |
441 |
return this; |
442 |
} |
443 |
|
444 |
/** |
445 |
* Sorts the array, assuming all elements are Comparable. Unlike |
446 |
* Arrays.sort, this sort does not guarantee that elements |
447 |
* with equal keys maintain their relative position in the array. |
448 |
* @return this (to simplify use in expressions) |
449 |
* @throws ClassCastException if any element is not Comparable |
450 |
*/ |
451 |
public ParallelLongArray sort() { |
452 |
super.sort(); |
453 |
return this; |
454 |
} |
455 |
|
456 |
/** |
457 |
* Removes consecutive elements that are equal, |
458 |
* shifting others leftward, and possibly decreasing size. This |
459 |
* method may be used after sorting to ensure that this |
460 |
* ParallelLongArray contains a set of unique elements. |
461 |
* @return this (to simplify use in expressions) |
462 |
*/ |
463 |
public ParallelLongArray removeConsecutiveDuplicates() { |
464 |
// Sequential implementation for now |
465 |
int k = 0; |
466 |
int n = fence; |
467 |
if (k < n) { |
468 |
long[] arr = this.array; |
469 |
long last = arr[k++]; |
470 |
for (int i = k; i < n; ++i) { |
471 |
long x = arr[i]; |
472 |
if (last != x) |
473 |
arr[k++] = last = x; |
474 |
} |
475 |
removeSlotsAt(k, n); |
476 |
} |
477 |
return this; |
478 |
} |
479 |
|
480 |
/** |
481 |
* Equivalent to {@code asList().addAll} but specialized for array |
482 |
* arguments and likely to be more efficient. |
483 |
* @param other the elements to add |
484 |
* @return this (to simplify use in expressions) |
485 |
*/ |
486 |
public ParallelLongArray addAll(long[] other) { |
487 |
int csize = other.length; |
488 |
int end = fence; |
489 |
insertSlotsAt(end, csize); |
490 |
System.arraycopy(other, 0, array, end, csize); |
491 |
return this; |
492 |
} |
493 |
|
494 |
/** |
495 |
* Appends all (possibly bounded, filtered, or mapped) elements of |
496 |
* the given ParallelDoubleArray, resizing and/or reallocating this |
497 |
* array if necessary. |
498 |
* @param other the elements to add |
499 |
* @return this (to simplify use in expressions) |
500 |
*/ |
501 |
public ParallelLongArray addAll(ParallelLongArrayWithLongMapping other) { |
502 |
int end = fence; |
503 |
if (other.hasFilter()) { |
504 |
PAS.FJLAppendAllDriver r = new PAS.FJLAppendAllDriver |
505 |
(other, end, array); |
506 |
ex.invoke(r); |
507 |
array = r.results; |
508 |
fence = end + r.resultSize; |
509 |
} |
510 |
else { |
511 |
int csize = other.size(); |
512 |
insertSlotsAt(end, csize); |
513 |
if (other.hasMap()) |
514 |
ex.invoke(new PAS.FJLMap(other, other.origin, other.fence, |
515 |
null, array, end - other.origin)); |
516 |
else |
517 |
System.arraycopy(other.array, 0, array, end, csize); |
518 |
} |
519 |
return this; |
520 |
} |
521 |
|
522 |
/** |
523 |
* Returns a new ParallelLongArray containing only the unique |
524 |
* elements of this array (that is, without any duplicates). |
525 |
* @return the new ParallelLongArray |
526 |
*/ |
527 |
public ParallelLongArray allUniqueElements() { |
528 |
return super.allUniqueElements(); |
529 |
} |
530 |
|
531 |
/** |
532 |
* Removes from the array all elements for which the given |
533 |
* selector holds. |
534 |
* @param selector the selector |
535 |
* @return this (to simplify use in expressions) |
536 |
*/ |
537 |
public ParallelLongArray removeAll(LongPredicate selector) { |
538 |
LFPap v = new LFPap(ex, 0, fence, array, selector); |
539 |
PAS.FJRemoveAllDriver f = new PAS.FJRemoveAllDriver(v, 0, fence); |
540 |
ex.invoke(f); |
541 |
removeSlotsAt(f.offset, fence); |
542 |
return this; |
543 |
} |
544 |
|
545 |
/** |
546 |
* Returns true if all elements at the same relative positions |
547 |
* of this and other array are equal. |
548 |
* @param other the other array |
549 |
*/ |
550 |
public boolean hasAllEqualElements(ParallelLongArrayWithLongMapping other) { |
551 |
return super.hasAllEqualElements(other); |
552 |
} |
553 |
|
554 |
/** |
555 |
* Returns the sum of elements. |
556 |
* @return the sum of elements |
557 |
*/ |
558 |
public long sum() { |
559 |
return super.sum(); |
560 |
} |
561 |
|
562 |
/** |
563 |
* Replaces each element with the running sum. |
564 |
* @return this (to simplify use in expressions) |
565 |
*/ |
566 |
public ParallelLongArray cumulateSum() { |
567 |
super.cumulateSum(); |
568 |
return this; |
569 |
} |
570 |
|
571 |
/** |
572 |
* Replaces each element with its prefix sum. |
573 |
* @return the total sum |
574 |
*/ |
575 |
public long precumulateSum() { |
576 |
return super.precumulateSum(); |
577 |
} |
578 |
|
579 |
/** |
580 |
* Returns an operation prefix that causes a method to |
581 |
* operate only on the elements of the array between |
582 |
* firstIndex (inclusive) and upperBound (exclusive). |
583 |
* @param firstIndex the lower bound (inclusive) |
584 |
* @param upperBound the upper bound (exclusive) |
585 |
* @return operation prefix |
586 |
*/ |
587 |
public ParallelLongArrayWithBounds withBounds(int firstIndex, |
588 |
int upperBound) { |
589 |
return super.withBounds(firstIndex, upperBound); |
590 |
} |
591 |
|
592 |
/** |
593 |
* Returns an operation prefix that causes a method to operate |
594 |
* only on the elements of the array for which the given selector |
595 |
* returns true. |
596 |
* @param selector the selector |
597 |
* @return operation prefix |
598 |
*/ |
599 |
public ParallelLongArrayWithFilter withFilter(LongPredicate selector) { |
600 |
return super.withFilter(selector); |
601 |
} |
602 |
|
603 |
/** |
604 |
* Returns an operation prefix that causes a method to operate |
605 |
* only on elements for which the given binary selector returns |
606 |
* true. |
607 |
* @param selector the selector |
608 |
* @return operation prefix |
609 |
*/ |
610 |
public ParallelLongArrayWithFilter withFilter |
611 |
(BinaryLongPredicate selector, |
612 |
ParallelLongArrayWithLongMapping other) { |
613 |
return super.withFilter(selector, other); |
614 |
} |
615 |
|
616 |
/** |
617 |
* Returns an operation prefix that causes a method to operate |
618 |
* only on elements for which the given indexed selector returns |
619 |
* true. |
620 |
* @param selector the selector |
621 |
* @return operation prefix |
622 |
*/ |
623 |
public ParallelLongArrayWithFilter withIndexedFilter |
624 |
(IntAndLongPredicate selector) { |
625 |
return super.withIndexedFilter(selector); |
626 |
} |
627 |
|
628 |
|
629 |
/** |
630 |
* Returns an operation prefix that causes a method to operate |
631 |
* on mapped elements of the array using the given op. |
632 |
* @param op the op |
633 |
* @return operation prefix |
634 |
*/ |
635 |
public <U> ParallelLongArrayWithMapping<U> withMapping |
636 |
(LongToObject<? extends U> op) { |
637 |
return super.withMapping(op); |
638 |
} |
639 |
|
640 |
/** |
641 |
* Returns an operation prefix that causes a method to operate |
642 |
* on mapped elements of the array using the given op. |
643 |
* @param op the op |
644 |
* @return operation prefix |
645 |
*/ |
646 |
public ParallelLongArrayWithLongMapping withMapping(LongOp op) { |
647 |
return super.withMapping(op); |
648 |
} |
649 |
|
650 |
/** |
651 |
* Returns an operation prefix that causes a method to operate |
652 |
* on mapped elements of the array using the given op. |
653 |
* @param op the op |
654 |
* @return operation prefix |
655 |
*/ |
656 |
public ParallelLongArrayWithDoubleMapping withMapping(LongToDouble op) { |
657 |
return super.withMapping(op); |
658 |
} |
659 |
|
660 |
/** |
661 |
* Returns an operation prefix that causes a method to operate |
662 |
* on binary mappings of this array and the other array. |
663 |
* @param combiner the combiner |
664 |
* @param other the other array |
665 |
* @return operation prefix |
666 |
* @throws IllegalArgumentException if other array is a |
667 |
* filtered view (all filters must precede all mappings) |
668 |
*/ |
669 |
public <V,W,X> ParallelLongArrayWithMapping<W> withMapping |
670 |
(LongAndObjectToObject<? super V, ? extends W> combiner, |
671 |
ParallelArrayWithMapping<X,V> other) { |
672 |
return super.withMapping(combiner, other); |
673 |
} |
674 |
|
675 |
/** |
676 |
* Returns an operation prefix that causes a method to operate |
677 |
* on binary mappings of this array and the other array. |
678 |
* @param combiner the combiner |
679 |
* @param other the other array |
680 |
* @return operation prefix |
681 |
* @throws IllegalArgumentException if other array is a |
682 |
* filtered view (all filters must precede all mappings) |
683 |
*/ |
684 |
public <V> ParallelLongArrayWithMapping<V> withMapping |
685 |
(LongAndDoubleToObject<? extends V> combiner, |
686 |
ParallelDoubleArrayWithDoubleMapping other) { |
687 |
return super.withMapping(combiner, other); |
688 |
} |
689 |
|
690 |
/** |
691 |
* Returns an operation prefix that causes a method to operate |
692 |
* on binary mappings of this array and the other array. |
693 |
* @param combiner the combiner |
694 |
* @param other the other array |
695 |
* @return operation prefix |
696 |
* @throws IllegalArgumentException if other array is a |
697 |
* filtered view (all filters must precede all mappings) |
698 |
*/ |
699 |
public <V> ParallelLongArrayWithMapping<V> withMapping |
700 |
(LongAndLongToObject<? extends V> combiner, |
701 |
ParallelLongArrayWithLongMapping other) { |
702 |
return super.withMapping(combiner, other); |
703 |
} |
704 |
|
705 |
/** |
706 |
* Returns an operation prefix that causes a method to operate |
707 |
* on binary mappings of this array and the other array. |
708 |
* @param combiner the combiner |
709 |
* @param other the other array |
710 |
* @return operation prefix |
711 |
* @throws IllegalArgumentException if other array is a |
712 |
* filtered view (all filters must precede all mappings) |
713 |
*/ |
714 |
public <V,W> ParallelLongArrayWithDoubleMapping withMapping |
715 |
(LongAndObjectToDouble<? super V> combiner, |
716 |
ParallelArrayWithMapping<W,V> other) { |
717 |
return super.withMapping(combiner, other); |
718 |
} |
719 |
|
720 |
/** |
721 |
* Returns an operation prefix that causes a method to operate |
722 |
* on binary mappings of this array and the other array. |
723 |
* @param combiner the combiner |
724 |
* @param other the other array |
725 |
* @return operation prefix |
726 |
* @throws IllegalArgumentException if other array is a |
727 |
* filtered view (all filters must precede all mappings) |
728 |
*/ |
729 |
public ParallelLongArrayWithDoubleMapping withMapping |
730 |
(LongAndDoubleToDouble combiner, |
731 |
ParallelDoubleArrayWithDoubleMapping other) { |
732 |
return super.withMapping(combiner, other); |
733 |
} |
734 |
|
735 |
/** |
736 |
* Returns an operation prefix that causes a method to operate |
737 |
* on binary mappings of this array and the other array. |
738 |
* @param combiner the combiner |
739 |
* @param other the other array |
740 |
* @return operation prefix |
741 |
* @throws IllegalArgumentException if other array is a |
742 |
* filtered view (all filters must precede all mappings) |
743 |
*/ |
744 |
public ParallelLongArrayWithDoubleMapping withMapping |
745 |
(LongAndLongToDouble combiner, |
746 |
ParallelLongArrayWithLongMapping other) { |
747 |
return super.withMapping(combiner, other); |
748 |
} |
749 |
|
750 |
/** |
751 |
* Returns an operation prefix that causes a method to operate |
752 |
* on binary mappings of this array and the other array. |
753 |
* @param combiner the combiner |
754 |
* @param other the other array |
755 |
* @return operation prefix |
756 |
* @throws IllegalArgumentException if other array is a |
757 |
* filtered view (all filters must precede all mappings) |
758 |
*/ |
759 |
public <V,W> ParallelLongArrayWithLongMapping withMapping |
760 |
(LongAndObjectToLong<? super V> combiner, |
761 |
ParallelArrayWithMapping<W,V> other) { |
762 |
return super.withMapping(combiner, other); |
763 |
} |
764 |
|
765 |
/** |
766 |
* Returns an operation prefix that causes a method to operate |
767 |
* on binary mappings of this array and the other array. |
768 |
* @param combiner the combiner |
769 |
* @param other the other array |
770 |
* @return operation prefix |
771 |
* @throws IllegalArgumentException if other array is a |
772 |
* filtered view (all filters must precede all mappings) |
773 |
*/ |
774 |
public ParallelLongArrayWithLongMapping withMapping |
775 |
(LongAndDoubleToLong combiner, |
776 |
ParallelDoubleArrayWithDoubleMapping other) { |
777 |
return super.withMapping(combiner, other); |
778 |
} |
779 |
|
780 |
/** |
781 |
* Returns an operation prefix that causes a method to operate |
782 |
* on binary mappings of this array and the other array. |
783 |
* @param combiner the combiner |
784 |
* @param other the other array |
785 |
* @return operation prefix |
786 |
* @throws IllegalArgumentException if other array is a |
787 |
* filtered view (all filters must precede all mappings) |
788 |
*/ |
789 |
public ParallelLongArrayWithLongMapping withMapping |
790 |
(BinaryLongOp combiner, |
791 |
ParallelLongArrayWithLongMapping other) { |
792 |
return super.withMapping(combiner, other); |
793 |
} |
794 |
|
795 |
/** |
796 |
* Returns an operation prefix that causes a method to operate on |
797 |
* mappings of this array using the given mapper that accepts as |
798 |
* arguments an element's current index and value, and produces a |
799 |
* new value. |
800 |
* @param mapper the mapper |
801 |
* @return operation prefix |
802 |
*/ |
803 |
public <U> ParallelLongArrayWithMapping<U> withIndexedMapping |
804 |
(IntAndLongToObject<? extends U> mapper) { |
805 |
return super.withIndexedMapping(mapper); |
806 |
} |
807 |
|
808 |
/** |
809 |
* Returns an operation prefix that causes a method to operate on |
810 |
* mappings of this array using the given mapper that accepts as |
811 |
* arguments an element's current index and value, and produces a |
812 |
* new value. |
813 |
* @param mapper the mapper |
814 |
* @return operation prefix |
815 |
*/ |
816 |
public ParallelLongArrayWithDoubleMapping withIndexedMapping |
817 |
(IntAndLongToDouble mapper) { |
818 |
return super.withIndexedMapping(mapper); |
819 |
} |
820 |
|
821 |
/** |
822 |
* Returns an operation prefix that causes a method to operate on |
823 |
* mappings of this array using the given mapper that accepts as |
824 |
* arguments an element's current index and value, and produces a |
825 |
* new value. |
826 |
* @param mapper the mapper |
827 |
* @return operation prefix |
828 |
*/ |
829 |
public ParallelLongArrayWithLongMapping withIndexedMapping |
830 |
(IntAndLongToLong mapper) { |
831 |
return super.withIndexedMapping(mapper); |
832 |
} |
833 |
|
834 |
/** |
835 |
* Returns an iterator stepping through each element of the array |
836 |
* up to the current limit. This iterator does <em>not</em> |
837 |
* support the remove operation. However, a full |
838 |
* {@code ListIterator} supporting add, remove, and set |
839 |
* operations is available via {@link #asList}. |
840 |
* @return an iterator stepping through each element |
841 |
*/ |
842 |
public Iterator<Long> iterator() { |
843 |
return new ParallelLongArrayIterator(array, fence); |
844 |
} |
845 |
|
846 |
static final class ParallelLongArrayIterator implements Iterator<Long> { |
847 |
int cursor; |
848 |
final long[] arr; |
849 |
final int hi; |
850 |
ParallelLongArrayIterator(long[] a, int limit) { arr = a; hi = limit; } |
851 |
public boolean hasNext() { return cursor < hi; } |
852 |
public Long next() { |
853 |
if (cursor >= hi) |
854 |
throw new NoSuchElementException(); |
855 |
return Long.valueOf(arr[cursor++]); |
856 |
} |
857 |
public void remove() { |
858 |
throw new UnsupportedOperationException(); |
859 |
} |
860 |
} |
861 |
|
862 |
// List support |
863 |
|
864 |
/** |
865 |
* Returns a view of this ParallelLongArray as a List. This List has |
866 |
* the same structural and performance characteristics as {@link |
867 |
* ArrayList}, and may be used to modify, replace or extend the |
868 |
* bounds of the array underlying this ParallelLongArray. The methods |
869 |
* supported by this list view are <em>not</em> in general |
870 |
* implemented as parallel operations. This list is also not |
871 |
* itself thread-safe. In particular, performing list updates |
872 |
* while other parallel operations are in progress has undefined |
873 |
* (and surely undesired) effects. |
874 |
* @return a list view |
875 |
*/ |
876 |
public List<Long> asList() { |
877 |
AsList lv = listView; |
878 |
if (lv == null) |
879 |
listView = lv = new AsList(); |
880 |
return lv; |
881 |
} |
882 |
|
883 |
/** |
884 |
* Returns the effective size of the underlying array. The |
885 |
* effective size is the current limit, if used (see {@link |
886 |
* #setLimit}), or the length of the array otherwise. |
887 |
* @return the effective size of array |
888 |
*/ |
889 |
public int size() { return fence; } |
890 |
|
891 |
/** |
892 |
* Returns the underlying array used for computations. |
893 |
* @return the array |
894 |
*/ |
895 |
public long[] getArray() { return array; } |
896 |
|
897 |
/** |
898 |
* Returns the element of the array at the given index. |
899 |
* @param i the index |
900 |
* @return the element of the array at the given index |
901 |
*/ |
902 |
public long get(int i) { return array[i]; } |
903 |
|
904 |
/** |
905 |
* Sets the element of the array at the given index to the given value. |
906 |
* @param i the index |
907 |
* @param x the value |
908 |
*/ |
909 |
public void set(int i, long x) { array[i] = x; } |
910 |
|
911 |
/** |
912 |
* Equivalent to {@code asList().toString()}. |
913 |
* @return a string representation |
914 |
*/ |
915 |
public String toString() { |
916 |
return asList().toString(); |
917 |
} |
918 |
|
919 |
/** |
920 |
* Ensures that the underlying array can be accessed up to the |
921 |
* given upper bound, reallocating and copying the underlying |
922 |
* array to expand if necessary. Or, if the given limit is less |
923 |
* than the length of the underlying array, causes computations to |
924 |
* ignore elements past the given limit. |
925 |
* @param newLimit the new upper bound |
926 |
* @throws IllegalArgumentException if newLimit less than zero |
927 |
*/ |
928 |
public final void setLimit(int newLimit) { |
929 |
if (newLimit < 0) |
930 |
throw new IllegalArgumentException(); |
931 |
int cap = array.length; |
932 |
if (newLimit > cap) |
933 |
resizeArray(newLimit); |
934 |
fence = newLimit; |
935 |
} |
936 |
|
937 |
final void replaceElementsParallelLongArrayWith(long[] a) { |
938 |
System.arraycopy(a, 0, array, 0, a.length); |
939 |
fence = a.length; |
940 |
} |
941 |
|
942 |
final void resizeArray(int newCap) { |
943 |
int cap = array.length; |
944 |
if (newCap > cap) { |
945 |
long[] a = new long[newCap]; |
946 |
System.arraycopy(array, 0, a, 0, cap); |
947 |
array = a; |
948 |
} |
949 |
} |
950 |
|
951 |
final void insertElementAt(int index, long e) { |
952 |
int hi = fence++; |
953 |
if (hi >= array.length) |
954 |
resizeArray((hi * 3)/2 + 1); |
955 |
if (hi > index) |
956 |
System.arraycopy(array, index, array, index+1, hi - index); |
957 |
array[index] = e; |
958 |
} |
959 |
|
960 |
final void appendElement(long e) { |
961 |
int hi = fence++; |
962 |
if (hi >= array.length) |
963 |
resizeArray((hi * 3)/2 + 1); |
964 |
array[hi] = e; |
965 |
} |
966 |
|
967 |
/** |
968 |
* Makes len slots available at index. |
969 |
*/ |
970 |
final void insertSlotsAt(int index, int len) { |
971 |
if (len <= 0) |
972 |
return; |
973 |
int cap = array.length; |
974 |
int newSize = fence + len; |
975 |
if (cap < newSize) { |
976 |
cap = (cap * 3)/2 + 1; |
977 |
if (cap < newSize) |
978 |
cap = newSize; |
979 |
resizeArray(cap); |
980 |
} |
981 |
if (index < fence) |
982 |
System.arraycopy(array, index, array, index + len, fence - index); |
983 |
fence = newSize; |
984 |
} |
985 |
|
986 |
final void removeSlotAt(int index) { |
987 |
System.arraycopy(array, index + 1, array, index, fence - index - 1); |
988 |
--fence; |
989 |
} |
990 |
|
991 |
final void removeSlotsAt(int fromIndex, int toIndex) { |
992 |
if (fromIndex < toIndex) { |
993 |
int size = fence; |
994 |
System.arraycopy(array, toIndex, array, fromIndex, size - toIndex); |
995 |
int newSize = size - (toIndex - fromIndex); |
996 |
fence = newSize; |
997 |
} |
998 |
} |
999 |
|
1000 |
final int seqIndexOf(long target) { |
1001 |
long[] arr = array; |
1002 |
int end = fence; |
1003 |
for (int i = 0; i < end; i++) |
1004 |
if (target == arr[i]) |
1005 |
return i; |
1006 |
return -1; |
1007 |
} |
1008 |
|
1009 |
final int seqLastIndexOf(long target) { |
1010 |
long[] arr = array; |
1011 |
for (int i = fence - 1; i >= 0; i--) |
1012 |
if (target == arr[i]) |
1013 |
return i; |
1014 |
return -1; |
1015 |
} |
1016 |
|
1017 |
final class ListIter implements ListIterator<Long> { |
1018 |
int cursor; |
1019 |
int lastRet; |
1020 |
long[] arr; // cache array and bound |
1021 |
int hi; |
1022 |
ListIter(int lo) { |
1023 |
this.cursor = lo; |
1024 |
this.lastRet = -1; |
1025 |
this.arr = ParallelLongArray.this.array; |
1026 |
this.hi = ParallelLongArray.this.fence; |
1027 |
} |
1028 |
|
1029 |
public boolean hasNext() { |
1030 |
return cursor < hi; |
1031 |
} |
1032 |
|
1033 |
public Long next() { |
1034 |
int i = cursor; |
1035 |
if (i < 0 || i >= hi) |
1036 |
throw new NoSuchElementException(); |
1037 |
long next = arr[i]; |
1038 |
lastRet = i; |
1039 |
cursor = i + 1; |
1040 |
return Long.valueOf(next); |
1041 |
} |
1042 |
|
1043 |
public void remove() { |
1044 |
int k = lastRet; |
1045 |
if (k < 0) |
1046 |
throw new IllegalStateException(); |
1047 |
ParallelLongArray.this.removeSlotAt(k); |
1048 |
hi = ParallelLongArray.this.fence; |
1049 |
if (lastRet < cursor) |
1050 |
cursor--; |
1051 |
lastRet = -1; |
1052 |
} |
1053 |
|
1054 |
public boolean hasPrevious() { |
1055 |
return cursor > 0; |
1056 |
} |
1057 |
|
1058 |
public Long previous() { |
1059 |
int i = cursor - 1; |
1060 |
if (i < 0 || i >= hi) |
1061 |
throw new NoSuchElementException(); |
1062 |
long previous = arr[i]; |
1063 |
lastRet = cursor = i; |
1064 |
return Long.valueOf(previous); |
1065 |
} |
1066 |
|
1067 |
public int nextIndex() { |
1068 |
return cursor; |
1069 |
} |
1070 |
|
1071 |
public int previousIndex() { |
1072 |
return cursor - 1; |
1073 |
} |
1074 |
|
1075 |
public void set(Long e) { |
1076 |
int i = lastRet; |
1077 |
if (i < 0 || i >= hi) |
1078 |
throw new NoSuchElementException(); |
1079 |
arr[i] = e.longValue(); |
1080 |
} |
1081 |
|
1082 |
public void add(Long e) { |
1083 |
int i = cursor; |
1084 |
ParallelLongArray.this.insertElementAt(i, e.longValue()); |
1085 |
arr = ParallelLongArray.this.array; |
1086 |
hi = ParallelLongArray.this.fence; |
1087 |
lastRet = -1; |
1088 |
cursor = i + 1; |
1089 |
} |
1090 |
} |
1091 |
|
1092 |
final class AsList extends AbstractList<Long> implements RandomAccess { |
1093 |
public Long get(int i) { |
1094 |
if (i >= fence) |
1095 |
throw new IndexOutOfBoundsException(); |
1096 |
return Long.valueOf(array[i]); |
1097 |
} |
1098 |
|
1099 |
public Long set(int i, Long x) { |
1100 |
if (i >= fence) |
1101 |
throw new IndexOutOfBoundsException(); |
1102 |
long[] arr = array; |
1103 |
Long t = Long.valueOf(arr[i]); |
1104 |
arr[i] = x.longValue(); |
1105 |
return t; |
1106 |
} |
1107 |
|
1108 |
public boolean isEmpty() { |
1109 |
return fence == 0; |
1110 |
} |
1111 |
|
1112 |
public int size() { |
1113 |
return fence; |
1114 |
} |
1115 |
|
1116 |
public Iterator<Long> iterator() { |
1117 |
return new ListIter(0); |
1118 |
} |
1119 |
|
1120 |
public ListIterator<Long> listIterator() { |
1121 |
return new ListIter(0); |
1122 |
} |
1123 |
|
1124 |
public ListIterator<Long> listIterator(int index) { |
1125 |
if (index < 0 || index > fence) |
1126 |
throw new IndexOutOfBoundsException(); |
1127 |
return new ListIter(index); |
1128 |
} |
1129 |
|
1130 |
public boolean add(Long e) { |
1131 |
appendElement(e.longValue()); |
1132 |
return true; |
1133 |
} |
1134 |
|
1135 |
public void add(int index, Long e) { |
1136 |
if (index < 0 || index > fence) |
1137 |
throw new IndexOutOfBoundsException(); |
1138 |
insertElementAt(index, e.longValue()); |
1139 |
} |
1140 |
|
1141 |
public boolean addAll(Collection<? extends Long> c) { |
1142 |
int csize = c.size(); |
1143 |
if (csize == 0) |
1144 |
return false; |
1145 |
int hi = fence; |
1146 |
setLimit(hi + csize); |
1147 |
long[] arr = array; |
1148 |
for (Long e : c) |
1149 |
arr[hi++] = e.longValue(); |
1150 |
return true; |
1151 |
} |
1152 |
|
1153 |
public boolean addAll(int index, Collection<? extends Long> c) { |
1154 |
if (index < 0 || index > fence) |
1155 |
throw new IndexOutOfBoundsException(); |
1156 |
int csize = c.size(); |
1157 |
if (csize == 0) |
1158 |
return false; |
1159 |
insertSlotsAt(index, csize); |
1160 |
long[] arr = array; |
1161 |
for (Long e : c) |
1162 |
arr[index++] = e.longValue(); |
1163 |
return true; |
1164 |
} |
1165 |
|
1166 |
public void clear() { |
1167 |
fence = 0; |
1168 |
} |
1169 |
|
1170 |
public boolean remove(Object o) { |
1171 |
if (!(o instanceof Long)) |
1172 |
return false; |
1173 |
int idx = seqIndexOf(((Long)o).longValue()); |
1174 |
if (idx < 0) |
1175 |
return false; |
1176 |
removeSlotAt(idx); |
1177 |
return true; |
1178 |
} |
1179 |
|
1180 |
public Long remove(int index) { |
1181 |
Long oldValue = get(index); |
1182 |
removeSlotAt(index); |
1183 |
return oldValue; |
1184 |
} |
1185 |
|
1186 |
public void removeRange(int fromIndex, int toIndex) { |
1187 |
removeSlotsAt(fromIndex, toIndex); |
1188 |
} |
1189 |
|
1190 |
public boolean contains(Object o) { |
1191 |
if (!(o instanceof Long)) |
1192 |
return false; |
1193 |
return seqIndexOf(((Long)o).longValue()) >= 0; |
1194 |
} |
1195 |
|
1196 |
public int indexOf(Object o) { |
1197 |
if (!(o instanceof Long)) |
1198 |
return -1; |
1199 |
return seqIndexOf(((Long)o).longValue()); |
1200 |
} |
1201 |
|
1202 |
public int lastIndexOf(Object o) { |
1203 |
if (!(o instanceof Long)) |
1204 |
return -1; |
1205 |
return seqLastIndexOf(((Long)o).longValue()); |
1206 |
} |
1207 |
} |
1208 |
|
1209 |
} |